Improved machine for roughening pavements



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AM, PHOTO-LITHU. C0. N.Y. (OSBRN ES PROCESS) UNITED STATES PATENT OFEICE.

EPHRAIM HAMBUJEB, OF NEW YORK, N. Y.

lIMPPIOVED MACHINE FOR ROUGHENING PAVEMENTS.

Specification forming part of Letters Patent No. 43,687, dated August 2, 1864.

To all whom it may concern.-

Be it known that I, EPHRAIM HAMBUJER., of the city, county, and State of New York, have invented a new and Improved Machine for Roughenin g the Pavement in Streets, Sac.; and I do' hereby declare that the following is a full, clear, and exact description thereof, which will enable others skilled in the art to make and use the same, reference being had to the accompanying drawings, making apart of this specification, in which- Figure l represents a longitudinal vertical section of this invention. Fig. 2 is a plan or top view of the same. Figs. 3 and 4 are detached views of the tool-holders with different tools, in a larger scale than the previous tigures.

Similar letters of reference indicate like parts.

This invention consists in the application to a truck of one or more pounders and suitable cams and gear-wheels in such a manner that by the action of said cams the pounders can be raised and dropped automatically by the action of the machine, if desired, or by hand, if the machine is stationary', and by these means the surface of pavements in streets, or iiags on sidewalksLcan be roughened, or ice can be removed; or, by changing the shape of the tools used in the ponnders, the machine may be used for leveling a street or other Surface.

A represents the platform of atruck, which is supported by four Wheels, B B', two in front and two in the rear, or, if desired, only one wheel Inay be placed in front. These wheels run on axles O C', and the axle C'` of the rear or driving wheels, B', bears a cogwheel, D, which gears in two cog-wheels, E, mounted on shafts e and these cog-wheels gear in pinions F, which are mounted on shafts f. The shaftsf also carry the cams G, which act upon tappets h, projectingfrom the pounders H. The cams may be made with two arms each, as shown in the drawings, or with only one or more, and the number of gear-wheels between the axle C' and the camshafts may be increased or diminished, as circumstances may dictate. The pounders H are guided in suitable boxes, I, secured to the platform of the truck, and as the truck is prothem by the action of cranks Li, secured to shafts l, which connect with the shat'tsj by gear-wheels m a. By this arrangement the pounders can be dropped repeatedly ou the same place, and the pavement of a street or the ags of a sidewalk can be roughened in a short time and with comparatively littlclabor.

The lower ends of the pounders form sockets k, which are pivoted to the stems, as clearly shown in Figs. 3 and 4, so that they can accommodate themselves to the sinuosities of the ground, and allow the tools to come down flat under all circumstances. The tools L L' are secured in the sockets by set-screws I, and if chisel shaped tools L are used the depth ot' the socket is regulated by plates o,

which are placed in the same, according to the length ot' the tools. 1f the tools are ilat and provided with a shoulder, as shown at L', these plates can be dispensed with.

Thettools L are particularly used for the purpose of roughening the pavement in a street, or the iiags of a sidewalk, and they may also be used for loosening the ice in streets or on sidewalks.

The tools L' are particularly intended to level the surface of a street or any other surface before or after the paving-stones are put down.

Havingthus described my invention, I claim as new and desire to secure by Letters Patentent- The adjustable hinged sockets k, applied to the pounders H, in combination wit-h the tools L or L', constructed and operating substantially as and for the purpose shown and described.

E. HAMBUJER. 

